Re: the quotes – they’re in Michtavim uMaamarim, as memory serves.
While American gedolim dealt with Rabbi Dr. Soloveichik as needed, including giving him kavod and/or working with him when that was necessary, they were perfectly clear about the heretical ideas he proposed (including Zionism) being exactly that: heretical. They certainly did know and respect his talmudic knowledge, but not beyond that.